pepe47 said..AUS1023 said..I use vector weed slaloms in 32,34,36 & 40 in tabou mantas & rrd xfires. I am extremely happy with the fins. Jesper Orth is the distributor for vector and his mob is 0439 978 708

+1
Some of the leading brands are just too blunt at the leading edge, whereas the vectors have a better entry profile.
I have just recently bought some Vector Slalom Weedies and am very, very pleased with the performance. Because the vectors are so chubby and powerful, I run the fins about 4cm shorter than the same size pointer that I would normally use in the board. The closest board I have to your friends Futura is my Falcon 113. I have purchased a Vector Slalom Weedy 34 for this board. I think that your friend's 30cm weedy is too small for that board.
See the recent weedy fin thread in the general section for more info - but importantly get your friend onto Jesper (contact details on above posts), he distributes Vector in Oz and lives in WA, and Jesper races at the highest levels and has input into the fin design and always has great info and advice
www.seabreeze.com.au/forums/Windsurfing/General/What-size-weed-fin/